Finding the Fourth Proportional to 71,945.35, 99,285.81 and 39,683.67

Step by Step Solution

1. Step 1: Write the proportion equation
   71,945.35 : 99,285.81 = 39,683.67 : x
2. Step 2: Convert to fraction form
   71,945.35/99,285.81 = 39,683.67/x
3. Step 3: Cross multiply
   71,945.35x = 99,285.81 × 39,683.67
4. Step 4: Simplify right side
   71,945.35x = 3,940,025,319.72
5. Step 5: Solve for x
   x = 3,940,025,319.72/71,945.35
6. Step 6: Final answer
   x = 54,764.14